michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "SharedDIB.h"
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace gfx {
michael@0: 
michael@0: SharedDIB::SharedDIB() :
michael@0:   mShMem(nullptr)
michael@0: {
michael@0: }
michael@0: 
michael@0: SharedDIB::~SharedDIB()
michael@0: {
michael@0:   Close();
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: SharedDIB::Create(uint32_t aSize)
michael@0: {
michael@0:   Close();
michael@0: 
michael@0:   mShMem = new base::SharedMemory();
michael@0:   if (!mShMem || !mShMem->Create("", false, false, aSize))
michael@0:     return NS_ERROR_OUT_OF_MEMORY;
michael@0: 
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: bool
michael@0: SharedDIB::IsValid()
michael@0: {
michael@0:   if (!mShMem)
michael@0:     return false;
michael@0: 
michael@0:   return mShMem->IsHandleValid(mShMem->handle());
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: SharedDIB::Close()
michael@0: {
michael@0:   delete mShMem;
michael@0: 
michael@0:   mShMem = nullptr;
michael@0: 
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: SharedDIB::Attach(Handle aHandle, uint32_t aSize)
michael@0: {
michael@0:   Close();
michael@0: 
michael@0:   mShMem = new base::SharedMemory(aHandle, false);
michael@0:   if(!mShMem)
michael@0:     return NS_ERROR_OUT_OF_MEMORY;
michael@0: 
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: SharedDIB::ShareToProcess(base::ProcessHandle aChildProcess, Handle *aChildHandle)
michael@0: {
michael@0:   if (!mShMem)
michael@0:     return NS_ERROR_UNEXPECTED;
michael@0: 
michael@0:   if (!mShMem->ShareToProcess(aChildProcess, aChildHandle))
michael@0:     return NS_ERROR_UNEXPECTED;
michael@0: 
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: } // gfx
michael@0: } // mozilla